Article
Materials Science, Ceramics
M. A. Arenas, A. Conde, I. Garcia, J. J. de Damborenea
Summary: The development of innovative ceramic tiles requires materials with improved performance and corrosion resistance, while also providing aesthetics. In this study, metal coatings were applied to glazed porcelain stoneware to achieve a gold-like color and smooth surface. The coating composition, scratch resistance, and corrosion behavior were evaluated, showing that both coatings are suitable for domestic environments.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Rajneesh Raghav, Ankit Kumar, Rahul S. Mulik
Summary: This study compares the CrN and CrTiN hard coatings developed on SiAlON ceramic tool inserts using magnetron sputtering PVD process. Different characterization techniques, such as EDS, XRD, and FESEM, were used to investigate the properties of the coatings. Micro-indentation test was conducted to characterize the hardness and adhesion strength. Turning tests were performed to compare the machining performance of coated and uncoated cutting tools. The findings show that SiAlON cutting inserts coated with CrN and CrTiN exhibit higher hardness and adequate adhesion, with better machining performance for CrTiN-coated inserts.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Coatings & Films
G. C. Mondragon-Rodriguez, J. L. Hernandez-Mendoza, A. E. Gomez-Ovalle, J. M. Gonzalez-Carmona, C. Ortega-Portilla, N. Camacho, A. Hurtado-Macias, D. G. Espinosa-Arbelaez, M. Alvarado-Orozco
Summary: Hard coatings are continuously improved due to industrial needs and efforts to reduce environmental impacts. Hf-doped Al0.64Ti0.36N coatings demonstrated higher hardness, modulus of elasticity, and stability under high-temperature tribology testing, with observations of oxide formation and its impact on the coatings' performance.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
K. Bobzin, T. Broegelmann, H. J. Maier, T. Heidenblut, C. Kahra, M. Carlet
Summary: During the hard machining of powder metallurgical high-speed steel, tools are exposed to both thermal and mechanical load due to finely dispersed carbides in the steel, which can affect cutting performance and lead to tool damage. Thin hard coatings like TiAlN deposited by physical vapor deposition are commonly used to improve tool performance. High power pulsed magnetron sputtering (HPPMS) offers technical benefits such as more uniform coating thickness distribution on tools compared to direct current magnetron sputtering (dcMS). By adding silicon to the coating system TiAlCrN to create TiAlCrSiN, a nanocomposite coating with improved mechanical properties can be produced. The influence of residual stresses on the mechanical properties and cutting performance of coatings is important, and the study examined the effects of different TiAlCrSiN hybrid coatings with varying substrate bias potentials. A compressive residual stress state between approximately -2 GPa and -3 GPa was found to provide the highest resistance against crack formation and the best cutting performance for the tested coatings.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Materials Science, Coatings & Films
Nina Schalk, Michael Tkadletz, Christian Mitterer
Summary: The study reviews the current research on protective hard coatings grown on cutting tools by PVD and CVD over decades, including coatings of different material classes, synthesis, structure-property relationships, and application performance. It discusses pioneering studies and recent findings contributing to the establishment of comprehensive relationships for the coatings, as well as provides condensed summaries and comparisons between PVD and CVD coatings. Current and future challenges for the hard coatings community are also surveyed.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Jaroslaw Mikula, Daniel Pakula, Ludwina Zukowska, Klaudiusz Golombek, Antonin Kriz
Summary: The study demonstrates that deposition of (Ti,Al)N coating on sintered tool materials can improve their wear resistance and extend tool life. The coating helps increase surface hardness, enhance thermal and chemical abrasion resistance, and improve chip formation and removal process conditions.
Article
Materials Science, Multidisciplinary
Mohamed Egiza, Ali M. Ali, Koki Murasawa, Tsuyoshi Yoshitake
Summary: This study investigates the effects of B doping on the mechanical, structural, and tribological properties of nanodiamond composite coatings. The results show that the hardness of the films decreases with increasing B content, attributed to film graphitisation induced by the catalytic effects of Co atoms. However, when a small amount of B is doped, the films exhibit enhanced hardness and improved adhesion due to a decrease in the catalytic effects of Co and the release of internal stress by forming C-B bonds. The B-doped NDC films also demonstrate promising performance for machining difficult-to-cut materials.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Materials Science, Coatings & Films
K. Bobzin, T. Broegelmann, N. C. Kruppe, J. Janowitz
Summary: In manufacturing technology, the performance of tools must meet higher standards; recording process data is increasingly important in Industrie 4.0; integrating electrical properties into coatings to design sensors helps extend process limits.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
Siti Rozakiyah Assurin, Paul Mativenga, Fatema Rajab, Kevin Cooke, Susan Field
Summary: The experimental results demonstrate that under specific laser parameters, hard DLC coating can be successfully removed without damaging the WC substrate. This new de-coating process is significant in the aerospace industry and holds promise for application in other cutting tools and applications.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2021)
Article
Materials Science, Coatings & Films
Andrei Surzhenkov, Mart Viljus, Maksim Antonov, Jakob Kubarsepp, Kristjan Juhani, Priit Kulu, Heinar Vagistrom, Vytenis Jankauskas, Rimtautas Leisys, Regita Bendikiene, Eron Adoberg, Priidu Peetsalu, Arvo Mere, Andre Gregor
Summary: This paper highlights the effect of laser heat treatment on the adhesion and sliding wear of PVD multilayer AlxTi1-xN and nanocomposite AlxTi1-xN/alpha-Si3N4 coatings on carbon and tool steel, as well as the microstructure and hardness of the substrate steel. Laser heat treatment resulted in significant improvements in hardness, adhesion load, scratch crack propagation resistance, and wear resistance of the coatings. The effects were more pronounced for the carbon steel substrate.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Engineering, Mechanical
Kelly Jacques, Nikhil Murthy, Satish Dixit, Diana Berman, Stephen Berkebile
Summary: This study used a high-frequency reciprocating tribometer to determine experimental parameters for inducing material scuffing, finding that the best results were achieved with perpendicular grinding lay and alumina counterface. The effectiveness of protective coatings in inhibiting scuffing initiation was also evaluated using a load progression from 1 N to 18 N.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Andreas Kretschmer, Alexander Kirnbauer, Eduardo Pitthan, Daniel Primetzhofer, Kumar Yalamanchili, Helmut Rudigier, Paul Heinz Mayrhofer
Summary: The phase stability and mechanical properties of multimetal-boronitride (Hf,Ta,Ti,V,Zr)-B-N were investigated using ab initio computations and experimental methods. Non-reactively sputtered (Hf,Ta,Ti,V,Zr)-B-N coatings exhibited a single-phase fcc solid solution with exceptional hardness and thermal stability. The (Hf,Ta,Ti,V,Zr)-B-N preferred the fcc NaCl-type structure up to a B:N ratio of 3.5.
MATERIALS & DESIGN
(2022)
Article
Metallurgy & Metallurgical Engineering
Mohammad Rafighi, Mustafa Ozdemir, Shadi Al Shehabi, Mehmet Tuncay Kaya
Summary: The results of the study showed that cutting speed, feed rate, and cutting depth have an impact on surface roughness, with the feed rate being the most significant factor. The cubic boron nitride insert outperformed the ceramic insert in terms of minimum surface roughness. Cutting force components were mainly affected by the insert type, with the cubic boron nitride insert causing greater forces during machining compared to the ceramic insert. The artificial neural network and response surface methodology showed good accuracy in predicting the responses, with the neural network demonstrating higher accuracy at 99.51%.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2021)
Article
Materials Science, Multidisciplinary
Peter Panjan, Aljaz Drnovsek, Nastja Mahne, Miha Cekada, Matjaz Panjan
Summary: This study investigates and compares the surface topography of hard coatings deposited by three different physical vapor deposition methods, summarizing the expertise gained during the development of PVD hard coatings for tool and machine component protection. Variations in surface topography between deposition techniques, the impact of ion etching on surface cleaning, and the causes of surface roughness in PVD coatings are discussed.
Article
Materials Science, Coatings & Films
Esad Kaya
Summary: This study investigated the performance of ceramic coatings on surfaces exposed to extreme conditions. It was found that ceramic particle-reinforced composite coatings exhibited superior hardness, toughness, and creep resistance compared to plasma-modified coatings. These coatings also showed improved wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Automation & Control Systems
Kubilay Aslantas, Sukru Ulker, Omer Sahan, Danil Yu Pimenov, Khaled Giasin
Summary: Microturning is a micromechanical machining process for producing microcylindrical or axially symmetrical parts, with workpieces of small diameter greatly affected by cutting forces. An analytical mechanistic model incorporating tool nose radius was used to predict cutting forces, and validation tests showed a model accuracy ranging from 3% to 24%. The developed model was observed to give accurate results even at depths of cut smaller than the nose radius and feed values smaller than the edge radius.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Characterization & Testing
Nihal Yumak, Kubilay Aslantas
Summary: This study investigated the fatigue crack propagation behavior of Ti-15V-3Al-3Sn-3Cr alloy with aging treatments under constant and variable amplitude loading. Different aging temperatures and times were applied to the alloy, and the results showed that these factors affected the crack propagation rate. Additionally, the impact of overload was observed, with the solution-treated sample showing increased crack propagation rate and the aged specimen exhibiting fracture due to the formation of microcracks.
JOURNAL OF TESTING AND EVALUATION
(2022)
Article
Engineering, Multidisciplinary
Nihal Yumak, Kubilay Aslantas, Ahmet Cetkin
Summary: This study investigates the effect of cryogenic treatment on metastable P. titanium alloys, specifically focusing on the microstructural and mechanical properties. It finds that the duplex aging treatment after cryogenic treatment leads to finer α phase precipitation and significant strength improvement without sacrificing elongation. Moreover, the crack propagation resistance of the duplex aged samples is higher compared to single-step aged samples.
JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
(2022)
Article
Engineering, Mechanical
Sezer Morkavuk, Ugur Koklu, Kubilay Aslantas
Summary: This study experimentally investigated the drilling machinability of flat, convex, and concave curved carbon fiber reinforced plastics, with results showing that the least thrust force and damage occurred when drilling the concave curved surface, while the largest thrust force and damage occurred when drilling the flat surface.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Review
Engineering, Manufacturing
Necati Ucak, Adem cicek, Kubilay Aslantas
Summary: In recent years, additive manufacturing (AM) of metallic parts has provided new opportunities for various industrial sectors and individual needs. While AM offers many advantages, poor surface quality of the produced parts is a common issue that requires additional machining operations. This review article investigates the machinability of 3D printed metallic parts fabricated by Selective Laser Melting (SLM) and Electron Beam Melting (EBM) technologies, and provides insights into their mechanical and physical properties. The article aims to compile relevant information and suggest machining strategies for these novel engineering materials, as well as highlight potential areas for future research.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Composites
Sezer Morkavuk, Ugur Koklu, Kubilay Aslantas
Summary: This study compares the drilling machinability of CFRP tubes and CFRP plates produced by different methods. Experimental results show that the plate generates more force and damage during drilling compared to the tubes, making it more difficult to machine. The filament wound tube exhibits higher thrust force and damage compared to the roll wrapped tube. Additionally, the use of support does not increase the thrust force in composite tubes, but significantly improves drilling-induced delamination damage behavior. The plate provides better borehole surface quality compared to the tubes, but more dust chip formation is observed.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Engineering, Manufacturing
Kubilay Aslantas, Ahmet Hascelik, Adem Cicek
Summary: The main problem in machining of aluminum alloys is chip adhesion to the cutting tool. Carbon-based coatings, such as DLC and NCD, can minimize chip adhesion. In this study, the performance of DLC and NCD coatings in micro milling of Al7075-T6 alloy was investigated. The results showed that coated tools had lower cutting forces, and uncoated and NCD coated tools had increased surface roughness and burr width for smaller cutting parameters.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Engineering, Mechanical
Saood Ali, Rendi Kurniawan, Xu Moran, Farooq Ahmed, Mohd Danish, Kubilay Aslantas
Summary: Introducing external surface features on mating contact surfaces effectively reduces friction and wear between the surfaces. The tribological properties of the contact surfaces can be improved by controlling the geometrical parameters of the surface texture. Experimental tests on steel and aluminum materials with hierarchical micro-dimple textures show a lower friction coefficient and improved tribological characteristics under boundary lubrication conditions. The secondary hierarchical nano-structures generate an additional hydrodynamic lift effect.
Article
Chemistry, Physical
Bekir Yalcin, Ali Yuksel, Kubilay Aslantas, Oguzhan Der, Ali Ercetin
Summary: This study investigates the behavior of an aluminum-polyethylene composite panel during micro-drilling, examining parameters such as thrust force, exit burr formation, and changes in the micro-tool. The results show that cutting speed and tool point angle have the greatest impact on the drilling process, with noticeable chip adhesion and the AlTiN coating affecting tool wear and hole diameter deviations.
Article
Chemistry, Analytical
Ucan Karakilinc, Berkay Ergene, Bekir Yalcin, Kubilay Aslantas, Ali Ercetin
Summary: Selective laser melting (SLM) is a 3D printing process that can produce complex geometries as an alternative to traditional processes. Micro milling plays a significant role in producing miniature geometries. This study compares the micro machinability of SLM parts with wrought Ti64.
Article
Materials Science, Multidisciplinary
Ali Ercetin, Oezguer Oezguen, Kubilay Aslantas, Oguzhan Der, Bekir Yalcin, Ercan Simsir, Muhammad Aamir
Summary: This research focuses on the fabrication and characterization of TAZ532-xNb composites. The composites were successfully formed by hot pressing using high-purity powders of Mg, Sn, Al, Zn, Mn, and Nb. XRD analysis confirmed the presence of desired phases in the composites. The composites exhibited high relative density, densely packed microstructure, and exceptional wetting characteristics. The mechanical properties, such as hardness and tensile strength, improved with increasing Nb reinforcement ratio.
Article
Chemistry, Analytical
Ali Ercetin, Kubilay Aslantas, Ozguer Ozguen, Mustafa Percin, Manjunath Patel Gowdru Chandrashekarappa
Summary: This study investigates the optimization parameters for micro-milling of Mg13Sn alloy and examines the effects of different cutting parameters on cutting forces and surface roughness. The results indicate that increasing the feed rate and depth of cut significantly increases the cutting forces, while increasing the cutting speed noticeably reduces the cutting forces. Additionally, the study finds that surface roughness increases with increasing feed rate but decreases with increasing cutting speed. The findings offer important insights for micro-milling of Mg13Sn alloys.
Article
Engineering, Multidisciplinary
Ahmet Hascelik, Kubilay Aslantas
Summary: In this study, the coefficients for estimating the cutting force in micro turning process were obtained using mechanistic and numerical modelling methods, and the results were validated through experimental data.
JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
(2022)
Article
Engineering, Mechanical
Yankui Song, Ke Xiao, Guo Xiang
Summary: The novelty of this study lies in constructing an Entropy-based wear and fluid-solid-thermal (FST) coupled model for journal bearings, and revealing the transient interaction behavior between wear evolution and FST evolution during repeated starting and stopping. The wear rate is measured experimentally, and the contact temperature, friction coefficient and normal contact force are obtained from the validated FST model. Wear tests and numerical calculations are conducted to validate the predicted wear rate and investigate the time-varying wear and FST evolution of journal bearings.
Article
Engineering, Mechanical
Xin-long Liu, Xin Guan, Yuan Zhong, Qian Xiao, Yong Cao, Wu-lue Zhang, Song Zhang, Yi-ting Zheng, Ming-sheng Gao, Dao-yun Chen, Wen-bin Yang
Summary: Gaps in the conductor rail joints of intercity trains have an impact on current transmission and the wear of carbon skateboards. These gaps decrease the coefficient of friction, increase electrical contact resistance, and affect the wear rate of carbon skateboards.
Article
Engineering, Mechanical
Yuhang Wu, Conglin Dong, Xiuqin Bai, Chengqing Yuan
Summary: The study developed a new composite material by incorporating hexagonal boron nitride (h-BN) particles into a thermoplastic polyurethane (TPU) matrix, which exhibited excellent self-lubricating properties and reduced frictional excitation forces. The addition of h-BN particles effectively reduced the coefficient of friction, decreased fluctuation amplitude, enhanced wear resistance, and attenuated vibration behaviors.
Article
Engineering, Mechanical
Tiancheng Ouyang, Xiuyang Sun, Wentao Tang, Yinxuan Li, Zhi Qun Tian, Yanzhou Li
Summary: By adding nitrogen-doped graphene and C60 nanoparticles to the lubricant, a highly efficient nano-lubricant with vibration and noise reduction properties is synthesized.
Article
Engineering, Mechanical
Xin Zhuo, Jun Cao, Haibo Huang, Li Liu, Xinkun Suo, Peiqing Ye, Zeshan Abbas
Summary: A polymer coating prepared by liquid spraying technology on the surface of 20CrMo steel demonstrates good tribological and anti-cavitation erosive properties. It can effectively replace CuPb24Sn copper alloy in valve plates for pumps under different lubrication conditions. The coating exhibits adhesive wear and reduces frictional loss, and mainly shows abrasive wear under complex working conditions. Its lipophilicity, high hardness to elastic modulus ratio, and corrosion resistance are the main influencing factors for its performance.
Article
Engineering, Mechanical
Md. Aminul Islam, Jiaren (Jimmy) Jiang, Yongsong Xie
Summary: Erosion-corrosion is a major factor in material loss and reduced useful life of hydro-transport equipment. This study evaluates the erosion-corrosion characteristics of different materials and finds that matrix wear affects the degradation of carbides. Sufficient wear and corrosion resistance in the surrounding matrix are important for good erosion-corrosion resistance.
Article
Engineering, Mechanical
Andre Dubois, Oussama Filali, Laurent Dubar
Summary: This study investigates the effect of surface roughness, contact pressure, and lubrication on the onset of galling in aluminum 6082-T6 using a pin-on-plate tribometer. The experimental results show that the roughness and lubricants play a significant role in preventing galling.
Article
Engineering, Mechanical
Jizhan Wu, Peitang Wei, Guoqiang Liu, Difa Chen, Xiuhua Zhang, Taimin Chen, Huaiju Liu
Summary: This study conducted a comprehensive evaluation of the DLC coating treatment on the loading capacity of gears and characterized the surface features and fatigue performance. The results demonstrate that DLC coating significantly improves the hardness and surface residual compressive stress of the gears, as well as enhances their contact fatigue performance.
Article
Engineering, Mechanical
Yangping Liu, Hwaran Lee, Annsley Mace, Jeremy L. Gilbert
Summary: An AFM-based single asperity tribology method was used to investigate the wear performance of carbides and base metal matrix in high carbon CoCrMo alloy. The wear behavior of the two types of carbides was stress-dependent and influenced by chemical composition. Cr-rich carbides exhibited higher wear resistance compared to Mo-rich carbides.
Article
Engineering, Mechanical
Zdenek Riha, Michal Zelenak, Akash Nag, Jakub Poloprudsky, Tomas Kruml, Sergej Hloch
Summary: This study investigates the erosion performances of a high-speed modulated jet (MWJ) and continuous water jet (CWJ). By comparing different nozzles and water jet powers, the effects of modulated and continuous jets on aluminum alloy were studied. The results show that under certain conditions, modulated jet can create deeper and sharper grooves while reducing the impact of lateral flow.
Article
Engineering, Mechanical
Chunyu Yu, Weipu Li, Yang Guo, Xianbin Sun, Fanli Hong, Ning Sun, Qinghai Zhang
Summary: This study explores the relationship between the wear rate of train brake pads and its features, and proposes a method for predicting the wear rate suitable for small sample data. Grey relational analysis and Pearson correlation analysis are used to determine the preferred features that affect the wear rate, and a BOA-BP model is established for prediction. The results show that BOA-BP exhibits better advantages in prediction with small samples.
Article
Engineering, Mechanical
Shan Yin, Xin Zhao, Shuangchao Huang, Zefeng Wen, Xuesong Jin
Summary: This study simulated the rolling contact of a driving wheelset over tangent and curved tracks at a speed up to 500 km/h using an explicit finite element approach to derive creep curves. The comparison between quasi-steady curves and transient curves in the presence of rail corrugation helped to identify cases where traditional theories are inapplicable and where transient effects must be considered. Additionally, the study further analyzed the influence of middle/high-frequency vibrations in the presence of rail corrugation.
Article
Engineering, Mechanical
Jiyao Zhang, Yuanlie Yu, Junlei Tang, Yingying Wang, Honggang Sun, Kaikai Song, Jianhong Gong, Pingping Liu, Xiaoming Liu, Lina Hu, Parthiban Ramasamy, Juergen Eckert
Summary: The influence of high-carbon addition on the microstructure, hardness, and wear behavior of CoCrNi alloy was investigated. It was found that the addition of carbon resulted in the formation of carbide particles, enhancing the hardness and improving the wear resistance. Fracture and detachment of hard carbides during friction introduced additional abrasive particles, transitioning the wear mechanism from adhesive-dominated to abrasive-dominated.
Article
Engineering, Mechanical
Yanfei Liu, Shengtao Yu, Ruize Zhang, Xiangyu Ge, Wenzhong Wang
Summary: This study reports the tribological behavior of nanodiamond plate (NDPL) as a nanoadditive for the first time and compares it with nanodiamond particles (NDPA). The results show that NDPL provides better lubrication performance at higher concentrations, and the sliding between NDPLs and the structural transformation from sp3 to sp2 carbon play a crucial role in lubrication and wear resistance.
